GB1295737A - - Google Patents

Info

Publication number
GB1295737A
GB1295737A GB1295737DA GB1295737A GB 1295737 A GB1295737 A GB 1295737A GB 1295737D A GB1295737D A GB 1295737DA GB 1295737 A GB1295737 A GB 1295737A
Authority
GB
United Kingdom
Prior art keywords
group
propiolactone
different
same
alkyl
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
English (en)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19691933730 external-priority patent/DE1933730A1/de
Priority claimed from DE19691964360 external-priority patent/DE1964360A1/de
Application filed filed Critical
Publication of GB1295737A publication Critical patent/GB1295737A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/78—Preparation processes
    • C08G63/82—Preparation processes characterised by the catalyst used
    • C08G63/823—Preparation processes characterised by the catalyst used for the preparation of polylactones or polylactides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polyesters Or Polycarbonates (AREA)
GB1295737D 1969-07-03 1970-06-30 Expired GB1295737A (enrdf_load_stackoverflow)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19691933730 DE1933730A1 (de) 1969-07-03 1969-07-03 Verfahren zur Polymerisation von alpha,alpha-Dialkyl-beta-propiolactonen
DE19691964360 DE1964360A1 (de) 1969-12-23 1969-12-23 Verfahren zur Polymerisation von alpha,alpha-Dialkyl-beta-propiolactonen

Publications (1)

Publication Number Publication Date
GB1295737A true GB1295737A (enrdf_load_stackoverflow) 1972-11-08

Family

ID=25757588

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1295737D Expired GB1295737A (enrdf_load_stackoverflow) 1969-07-03 1970-06-30

Country Status (6)

Country Link
US (1) US3691138A (enrdf_load_stackoverflow)
BE (1) BE752979A (enrdf_load_stackoverflow)
FR (1) FR2050469A1 (enrdf_load_stackoverflow)
GB (1) GB1295737A (enrdf_load_stackoverflow)
LU (1) LU61232A1 (enrdf_load_stackoverflow)
NL (1) NL7009871A (enrdf_load_stackoverflow)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL294714A (enrdf_load_stackoverflow) * 1963-06-28
US3476715A (en) * 1966-06-01 1969-11-04 Du Pont Process for polymerizing propiolactones using tertiary phosphine catalysts

Also Published As

Publication number Publication date
FR2050469A1 (fr) 1971-04-02
BE752979A (fr) 1970-12-16
NL7009871A (enrdf_load_stackoverflow) 1971-01-05
LU61232A1 (enrdf_load_stackoverflow) 1970-09-10
US3691138A (en) 1972-09-12

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees